Flora of North America species comparison

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Packera bolanderi

Bolander's groundsel, Bolander's ragwort
Habit Perennials, 20–50+ cm; fibrous-rooted (caudices creeping).
Stems

1 or 2–3, loosely clustered, glabrous.
Basal leaves

(and proximal cauline) petiolate;

blades ± orbiculate to oblong, or lyrate (lateral lobes 1–3 pairs, sinuses usually rounded, midribs usually winged), 50–120+ × 30–70+ mm, bases cordate to subcordate, margins shallowly to deeply incised.
Cauline leaves

gradually reduced (petiolate or sessile and clasping; lanceolate, incised).
Peduncles

ebracteate or inconspicuously bracteate, glabrous.
Ray florets

8 or 13;

corolla laminae 10–15+ mm.
Disc florets

30–45+;

corolla tubes 3–4 mm, limbs 3.5–4.5 mm.
Phyllaries

(8), 13, or 21, dark green, 5–8 mm, glabrous or sparsely tomentose proximally.
Calyculi

conspicuous.
Heads

8–15+ in corymbiform or subumbelliform arrays.
Cypselae

2.5–3.5 mm, glabrous;

pappi 5–7 mm.
2n

= 46.

Packera bolanderi
Distribution
from FNA
CA; OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

The two varieties of Packera bolanderi have been treated as species. The morphologic characteristics used to distinguish the varieties vary widely within some populations. Presence or absence of multicellular hairs has been used to separate the varieties; that trait is also variable. The morphologic distinction is weak; habitat and elevation records lend support for recognizing two varieties.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Basal leaves (relatively thick and turgid); phyllaries 13 or 21, 6–8+ mm, hairy proximally (hairs tan or brownish, multicelled)
var. bolanderi
1. Basal leaves (relatively thin); phyllaries 8, 13, (or 21), 5–6 mm, glabrous
var. harfordii
Source FNA vol. 20, p. 579.
Parent taxa Asteraceae > tribe Senecioneae > Packera
Sibling taxa
P. anonyma, P. antennariifolia, P. aurea, P. bernardina, P. breweri, P. cana, P. cardamine, P. castoreus, P. clevelandii, P. contermina, P. crocata, P. cymbalaria, P. cynthioides, P. debilis, P. dimorphophylla, P. eurycephala, P. fendleri, P. flettii, P. franciscana, P. ganderi, P. glabella, P. greenei, P. hartiana, P. hesperia, P. hyperborealis, P. indecora, P. ionophylla, P. layneae, P. macounii, P. malmstenii, P. millefolium, P. millelobata, P. multilobata, P. musiniensis, P. neomexicana, P. obovata, P. ogotorukensis, P. pauciflora, P. paupercula, P. plattensis, P. porteri, P. pseudaurea, P. quercetorum, P. sanguisorboides, P. schweinitziana, P. spellenbergii, P. streptanthifolia, P. subnuda, P. tampicana, P. texensis, P. tomentosa, P. tridenticulata, P. werneriifolia
Subordinate taxa
P. bolanderi var. bolanderi, P. bolanderi var. harfordii
Synonyms Senecio bolanderi
Name authority (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 45. (1981)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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